travis-ci should use latest chromium-browser

Author: borysn

.travis.yml

@@ -1,6 +1,8 @@
 language: java
 
 before_install:
+  - sudo apt-get -qq update
+  - sudo apt-get install -y chromium-browser
   - export CHROME_BIN=chromium-browser
   - export DISPLAY=:99.0
   - sh -e /etc/init.d/xvfb start